A 6-year old intact male domestic short haired cat presents with acute onset exophthalmos of the right eye in the past 2 days. He is painful on palpation around his eye and head. The eye can be retropulsed some, but there is resistance present. He has not been eating in the past day and has a rectal temperature of 103.4F (39.7 C). What is the most likely diagnosis? 一只6岁的胸型家养短毛猫过去2天以来出现急性右眼眼球突出。在触诊其眼睛和头部时他表现出了明显的疼痛反应。突出的眼球可以被推回少许但是有明显阻力。他已经一天没有进食，直肠温度为39.7摄氏度。最可能的诊断是什么？